TC uses TAB in the sections LeftHistory/RightHistory for separating path from the cursor position. The problem is, some text editors may be configured to automatically replace TABs with spaces, so if anybody uses such editor to edit wincmd.ini, all cursor positions will be completely broken.

I'd suggest to use some alternative non-whitespace character as delimiter, for example, vertical line symbol which is forbidden in Windows file names.

ghisler(Author)
I think it's called forward compatibility (old application using new data), backward will be OK.

Yes, forward compatibility will break, but it's only significant for 9.x. Normally if users have to run two versions of TC it's because something seriously changed that broke their scenarios. But then it should be some really old version. 9.10 and 9.0x are very similar, so there's little need to have them both at the same time. And versions older than 9.0x are already incompatible, in any case._________________Flint's Homepage: Full TC Russification Package, VirtualDisk, NTFS Links, NoClose Replacer, other stuff!

The tab was especially used to get compatibility in both directions. The names will be lost when saving the history with an older version, but the history will satill work._________________Author of Total Commander
http://www.ghisler.com

So, what you mean is, older TC for some reason already skipped TAB symbols and everything after them, and so this helped you maintain forward compatibility which would not work with any other delimiter, is that right?

MVV
Good editors allow to configure all this behaviour. I can easily imagine somebody who configured his editor to do the replacement. For example if he is a Python developer, this might be a way to avoid TAB/space indent fuss. Or there are many developers who simply hate TABs and only use spaces everywhere. And if they don't use editor much outside of work they might not bother with file types, just make it all alike.

Probably, not the most common scenario, but still quite possible._________________Flint's Homepage: Full TC Russification Package, VirtualDisk, NTFS Links, NoClose Replacer, other stuff!